That’s a nice looking amp, I’d be interested in hearing it sometime. Interesting that you have to get that high watt model before you get 1MOhm input impedance, their lower watt amps have only 480K and recommend a high output pickup/preamp.

So far the Schertler JAM is still my favorite acoustic combo amp for its tone and ability to reach 40Hz, once you can hear those deep fundamentals its hard to go back. Beats out other combos I’ve used from Fishman, Hughes and Kettner Era 2, Acoustic Image, and Line 6 StageSource.